TY  - JOUR
AU  - Li, X.
AU  - Brauers, T.
AU  - Häseler, R.
AU  - Bohn, B.
AU  - Fuchs, H.
AU  - Hofzumahaus, A.
AU  - Holland, F.
AU  - Lou, S.
AU  - Lu, K.D.
AU  - Rohrer, F.
AU  - Hu, M.
AU  - Zeng, L.M.
AU  - Zhang, Y.H.
AU  - Garland, R.M.
AU  - Su, H.
AU  - Nowak, A.
AU  - Wiedensohler, A.
AU  - Takegawa, N.
AU  - Shao, M.
AU  - Wahner, A.
TI  - Exploring the atmospheric chemistry of nitrous acid (HONO) at a rural site in Southern China
JO  - Atmospheric chemistry and physics
VL  - 12
SN  - 1680-7316
CY  - Katlenburg-Lindau
PB  - EGU
M1  - PreJuSER-20012
SP  - 1497 - 1513
PY  - 2012
N1  - This work was supported by the China National Basic Research and Development Program 2002CB410801, and the National High Technology Research and Development Program of China (863 Program) 2006AA06A301.
AB  - We performed measurements of nitrous acid (HONO) during the PRIDE-PRD2006 campaign in the Pearl River Delta region 60 km north of Guangzhou, China, for 4 weeks in June 2006. HONO was measured by a LOPAP in-situ instrument which was setup in one of the campaign supersites along with a variety of instruments measuring hydroxyl radicals, trace gases, aerosols, and meteorological parameters. Maximum diurnal HONO mixing ratios of 1-5 ppb were observed during the nights. We found that the nighttime build-up of HONO can be attributed to the heterogeneous NO2 to HONO conversion on ground surfaces and the OH + NO reaction. In addition to elevated nighttime mixing ratios, measured noontime values of approximate to 200 ppt indicate the existence of a daytime source higher than the OH + NO -> HONO reaction. Using the simultaneously recorded OH, NO, and HONO photolysis frequency, a daytime additional source strength of HONO (P-M) was calculated to be 0.77 ppb h(-1) on average. This value compares well to previous measurements in other environments. Our analysis of P-M provides evidence that the photolysis of HNO3 adsorbed on ground surfaces contributes to the HONO formation.
KW  - J (WoSType)
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000300656500017
DO  - DOI:10.5194/acp-12-1497-2012
UR  - https://juser.fz-juelich.de/record/20012
ER  -